Resin composition and resin shaped product

ABSTRACT

There is provided a resin composition which contains a cellulose ester resin, a polyether ester compound, and an additive if necessary, the resin composition being capable of providing a resin shaped product with excellent transparency, tensile fracture energy property, and the like, and of being suppressed from deterioration of flowability.

CROSS-REFERENCE TO RELATED APPLICATION(S)

This application is a continuation of U.S. application Ser. No.14/611,665 filed Feb. 2, 2015, which is based on and claims priorityunder 35 U.S.C. 119 from Japanese Patent Application Nos. 2014-197375filed on Sep. 26, 2014, 2014-196845 filed on Sep. 26, 2014, 2014-196852filed on Sep. 26, 2014, 2014-197378 filed on Sep. 26, 2014, and2014-197377 filed on Sep. 26, 2014.

BACKGROUND

1. Technical Field

The present invention relates to a resin composition and a resin shapedproduct.

2. Related Art

Conventionally, various resin compositions containing a cellulose esterresin have been provided and used for manufacturing various resin shapedproducts.

SUMMARY

According to one aspect of the invention, there is provided a resincomposition, including: a cellulose ester resin; and a polyether estercompound.

DETAILED DESCRIPTION

Hereinafter, an exemplary embodiment of the present invention will bedescribed. The following explanation and examples are simply an exampleof the present invention and do not limit the scope of the presentinvention.

In a case for explaining an amount of each component in a composition,when a plurality of material is present in a component, the amount ofthe component means a sum of the plurality of materials unless otherwisementioned.

<Resin Composition>

A resin composition of exemplary embodiments of the present inventioncontains a cellulose resin and a polyether ester compound. The resincomposition of exemplary embodiments of the present invention containsthe cellulose ester resin as the main component. The main componentmeans a component having the largest content (by weight) amongcomponents contained in the resin composition.

Here, a resin shaped product made from a cellulose ester resin alonehaving, depending on a structure of a substituent contained therein, ahigh transparency, and for example, a total light transmittance of 85%or more and 88% or less in a film having a thickness of 2 mm, and beingformed by cast molding or the like at a lower temperature of 30° C. orless. On contrary, in a case where a second component which has adifferent chemical structure from a cellulose resin is added to thecellulose resin, transparency is degraded. For example, a cast filmhaving a thickness of 2 mm and being cast-molded by using triacetylcellulose alone has a total light transmittance of 88%. When triphenylphosphate, which is a general plasticizer, is added to the cast film ata ratio of 20% by weight, the total light transmittance is lowered to85%.

Also, a cellulose ester resin generally has a high water absorptionability and a low water repellency due to presence of a hydroxyl groupor an acyl group in a molecular structure. Thus, a pellet of a resincomposition made from a cellulose ester resin alone and a resin shapedproduct formed by the cellulose ester resin has a low water repellency.

Further, the cellulose ester resin generally has a poor thermoplasticproperty since a melt viscosity is not lowered even when being heated.Thus, a resin composition made from the cellulose ester resin alone hasa low flowability and poor moldability.

When a plasticizer having a good affinity with the cellulose ester resinand a low melt viscosity is blended with the cellulose ester resin,thermoplastic property is imparted. In the cellulose ester resin,although melt viscosity is lowered as an amount of the plasticizer islarge, thermoplastic property is improved, that is flowability of theresin is enhanced. However, due to effects of temperature, humidity andtime, a phenomenon (bleeding phenomenon) where the plasticizer isprecipitated on the surface of a pellet of the resin composition and theresin shaped product is occurred in some cases. In the case ofoccurrence of this bleeding phenomenon, 1) deterioration in appearanceof the resin shaped product, 2) adhesion of the plasticizer to a hand orthe like when being in contact with the pellet of the resin compositionor the resin shaped product, and 3) deterioration in mechanical strengthof the resin shaped product, are occurred in some cases. Thus,moldability (thermoplastic property and flowability) and bleedingresistance have a trade-off relationship, and achievement of boththereof has been desired.

As mentioned above, the amount of the plasticizer is currently limited.In the limited amount of the plasticizer, a resin composition containingthe cellulose ester resin does not have sufficient thermoplasticproperty (flowability), and a creaking noise from a screw of a moldingmachine is generated at molding in some case. A creaking noise atmolding is a phenomenon occurred when the screw and the resincomposition is rubbed by increasing rotational torque (plasticizedtorque) of the screw of the molding machine thermoplastic property(flowability) of the resin composition is low. Further, in the limitedamount of the plasticizer, a resin shaped product obtained from theresin composition containing the cellulose resin has insufficienttoughness, and steel ball drop strength of the resin shaped product isinsufficient in some cases.

As a method of solving the above problems of the cellulose ester resin,in a case where a polyether ester compound is blended with a celluloseester resin, transparency (total light transmittance) is improvedcompared to the case of using the cellulose ester resin alone. Thisreason has not been cleared, but the following reason may be assumed.

An ether portion and an alkylene group in an ester portion of thepolyether ester compound have affinity with the cellulose ester resin,and thereby the terminal of the ester portion has a suitable free volumeand an orientation of the cellulose ester resin is disturbed. Due to theaffinity between of the polyether ester compound and the cellulose esterresin, intermolecular forces between the cellulose ester resin becomeslow, a dispersion state of the polyether ester compound and thecellulose ester resin becomes substantially uniform, and thereby themixture of the both components has a high isotropy.

In other words, by the affinity of the polyether ester compound and thecellulose ester resin, the both components are substantially uniformlydispersed and have a suitable steric hindrance, and therefore anisotropyin which a cellulose ester resin originally has tends not to be shown.Thus, a high tensile fracture energy may be developed.

In view of the above, the resin composition of exemplary embodiments ofthe present invention is capable of obtaining a resin shaped productbeing excellent in transparency and tensile fracture energy property byhaving the above configuration. The resin composition of exemplaryembodiments of the present invention has a thermoplastic property(flowability) and a high moldability. It is considered that this isbecause an affinity between the cellulose resin and the polyether estercompound is high, and the both components are substantially uniformlydispersed, and thereby a high isotropy is obtained.

The resin composition of exemplary embodiments of the present inventionmay further contain an acrylonitrile-butadiene-styrene resin(hereinafter, referred to as ABS resin in some cases). By containing theABS resin, there can be provided a resin composition capable ofobtaining a resin shaped product having an excellent water repellency.This reason has not been cleared, but the following reason may beassumed.

When the ABS resin is blended to the system of the cellulose ester resinand the polyether ester compound, a portion of acrylonitrile structureof the ABS resin has affinity with a hydroxyl group of the celluloseester resin and protects (blocks) the hydroxyl group. Further, the ABSresin having a high hydrophobicity is finely dispersed in a state ofsubstantial uniform with the cellulose ester resin. Also, by finelydispersing the ABS resin, fine unevenness structure is formed at asurface of a pellet of a resin composition and a resin shaped product ofthe resin composition. This fine unevenness structure contributes toLotus effect that a contact area with water becomes small, and thestructure is one factor for developing an excellent water repellency.

Thus, by blending the ABS resin to the system of the cellulose esterresin and the polyether ester compound, there can be provided a resincomposition capable of obtaining a resin shaped product having anexcellent water repellency.

The resin composition of exemplary embodiments of the present inventionmay further contain a maleic anhydride-modified ethylene-vinyl acetatecopolymer (referred to as “maleic anhydride-modified EVA resin”). Bycontaining the maleic anhydride-modified EVA resin, there can beprovided a resin composition capable of obtaining a resin shaped producthaving an excellent bleeding resistance, the resin composition having anexcellent moldability. This reason has not been cleared, but thefollowing reason may be assumed.

When the polyether ester compound is blended with the cellulose esterresin, as mentioned above, intermolecular forces of the cellulose esterresin are weaken to a suitable degree due to the high affinity and themolecular structure of the polyether ester compound, and thereby athermoplastic property is enhanced. On contrary, when leaving themixture at a high humidity environment for a long time, the polyetherester compound is hydrolyzed to lower weight molecular, and thereby atendency of bleeding becomes high.

Here, when the maleic anhydride-modified EVA resin is blended to thesystem of the cellulose ester resin and the polyether ester compound,the maleic anhydride-modified EVA resin is substantially uniformlydispersed in the resin composition by reacting a maleic anhydrideportion with a hydroxyl group of the cellulose ester resin. Furthermore,the maleic anhydride-modified EVA resin has a function of absorbingmoisture in atmosphere and suppresses the polyether ester compound frombeing hydrolyzed. Thus, lowering weight molecular of the polyether estercompound is suppressed, and thereby occurrence of bleeding issuppressed.

Thus, by blending the maleic anhydride-modified EVA resin to the systemof the cellulose ester resin and the polyether ester compound, there canbe provided a resin composition capable of obtaining a resin shapedproduct having an excellent bleeding resistance, the resin compositionhaving an excellent moldability.

The resin composition of exemplary embodiments of the present inventionmay further contain a polyhydroxyalkanoate resin. By containing thepolyhydroxyalkanoate resin, there can be provided a resin compositioncapable of obtaining a resin shaped product having an excellent surfaceglossiness. This reason has not been cleared, but the following reasonmay be assumed.

When the polyhydroxyalkanoate resin is blended to the system of thecellulose ester resin and the polyether ester compound, thepolyhydroxyalkanoate resin has a fine spherical structure due torepulsive forces from the cellulose ester resin. By dispersing thepolyhydroxyalkanoate resin having the fine spherical structure in asubstantially uniform state, glossiness is developed.

Thus, by blending the polyhydroxyalkanoate resin to the system of thecellulose ester resin and the polyether ester compound, there can beprovided a resin composition capable of obtaining a resin shaped producthaving an excellent surface glossiness.

The resin composition of exemplary embodiments of the present inventionmay further contain a polyolefin resin. By containing the polyolefinresin, there can be provided a resin composition capable of obtaining aresin shaped product having an excellent steel ball drop strength, theresin composition being capable of suppressing the creaking noisegenerated from the screw of the molding machine at molding from beingoccurred. This reason has not been cleared, but the following reason maybe assumed.

When the polyolefin resin having a low affinity with the cellulose resinis blended to the system of the cellulose ester resin and the polyetherester compound, the polyolefin resin penetrates a space between themolecules of the cellulose ester resin, and slipping at a surfacebetween the polyolefin resin and the cellulose resin is occurred. Thisslipping contributes to thermoplastic property (flowability) of theresin composition, and thereby the plasticized torque of the screw ofthe molding machine is reduced.

Further, since the polyolefin resin penetrates the space betweenmolecules of the cellulose ester resin, the can be provide a resinshaped product having a high toughness.

Thus, by blending the polyolefin resin to the system of the celluloseester resin and the polyether ester compound, there can be provided aresin composition capable of obtaining a resin shaped product having anexcellent steel ball drop strength, the resin composition being capableof suppressing the creaking noise generated from the screw of themolding machine at molding from being occurred.

In view of the above, the resin composition of exemplary embodiments ofthe present invention is capable of obtaining a resin shaped productbeing excellent in transparency and tensile fracture energy property byhaving the above configuration. The resin composition of exemplaryembodiments of the present invention has a thermoplastic property(flowability) and a high moldability. It is considered that this isbecause an affinity between the cellulose resin and the polyether estercompound is high, and the both components are substantially uniformlydispersed, and thereby a high isotropy is obtained.

Hereinafter, components of the resin shaped product of exemplaryembodiments of the present invention will be described.

[Cellulose Ester Resin]

The resin composition of exemplary embodiments of the present inventioncontains a cellulose ester resin. Examples of the cellulose ester resininclude a cellulose ester resin represented by formula (1).

In formula (1), R1, R2 and R3 each independently represent a hydrogenatom or an acyl group having 1 to 3 carbon atoms. n represents aninteger of 1 or more.

Examples of an acyl group represented by R1, R2 and R3 include an acetylgroup, a propionyl group, a butyryl group and the like. In terms ofimprovement of transparency and tensile fracture energy property of theresin shaped product, an acyl group is preferably an acetyl group.

In formula (1), a range of n is not particularly limited. However, therange is preferably 250 or more and 750 or less, and more preferably 350or more and 600 or less. When n is 250 or more, a strength of the resinshaped product tends to be enhanced. When n is 750 or less, degradationof flexibility of the resin shaped product tends to be suppressed. Thus,when n falls within the range, tensile fracture energy property isfurther enhanced.

Here, the phrase “R1, R2 and R3 each independently represent an acylgroup” means that at least one portion of hydroxyl group in thecellulose ester resin represented by formula (1) is acylated.

That is, all R1's contained in the cellulose ester resin may be the sameor different or a part of R1's contained in the cellulose ester resinmay be the same. R2's and A3's are similar to R1's.

A substitution degree of the cellulose ester resin is preferably 2.1 ormore and 2.6 or less, and more preferably 2.2 or more and 2.5 or less.

When the substitution degree is 2.6 or less, a crystallization of thecellulose ester resin may be suppressed, and thereby a thermoplasticproperty may be easily developed. Thus, when the substitution degreefalls within the above range, transparency and tensile fracture energyproperty of the resin shaped product are further improved. Also, amoldability of the resin composition is further improved.

Meanwhile, the substitution degree is an index showing a degree ofacylation of the cellulose ester resin. Specifically, the substitutiondegree means an average number of substitution of 3 hydroxyl group of aglucopyranose unit in the cellulose ester resin by an acyl group in amolecular.

Here, in terms of improvement of transparency and tensile fractureenergy property of the resin shaped product, the cellulose ester resinpreferably has an acetyl group as an acyl group in which R1, R2 and R3each independently represent and has a substitution degree of 2.1 ormore and 2.6 or less.

A weight average molecular weight (Mw) of the cellulose ester resin ispreferably 100,000 or more and 300,000 or less, and more preferably150,000 or more and 200,000 or less, in terms of improvement oftransparency and tensile fracture energy property of the resin shapedproduct. The weight average molecular weight may be measured in the samemanner as in a method for measuring a weight average molecular weight ofthe polyether ester compound.

Hereinafter, specific examples of the cellulose ester resin will beshown, but the cellulose ester resin is not limited thereto.

TABLE 1 Substitution No. Name of Compound Product Name ManufacturerSubstitution R1, R2 and R3 Degree CE1 Compound 1 diacethyl celluloseL-50 Daicel Corporation hydrogen atom or acetyl group 2.5 CE2 Compound 2diacethyl cellulose L-20 Daicel Corporation hydrogen atom or acetylgroup 2.5 CE3 Compound 3 diacethyl cellulose L-50 reforming productDaicel Corporation hydrogen atom or acetyl group 2.4 CE4 Compound 4diacethyl cellulose L-50 reforming product Daicel Corporation hydrogenatom or acetyl group 2.0 CE5 Compound 5 diacethyl cellulose L-20reforming product Daicel Corporation hydrogen atom or acetyl group 2.4CE6 Compound 6 cellulose triacetate LT-55 Daicel Corporation hydrogenatom or acetyl group 2.7 CE7 Compound 7 cellulose acetate CAP482-20Eastman Chemical hydrogen atom, acetyl group or 2.6 propionate Companypropionyl group CE8 Compound 8 cellulose acetate CAB381-0.1 EastmanChemical hydrogen atom, acetyl group or 2.6 butylate Company propionylgroup

[Polyether Ester Compound]

The resin composition of exemplary embodiments of the present inventioncontains a polyether ester compound. Examples of the polyether estercompound include a polyether ester compound represented by formula (2).

In formula (2), R4 and R5 each independently represent an alkylene grouphaving 2 to 10 carbon atoms. A1 and A2 each independently represent analkyl group having 1 to 6 carbon atoms, an aryl group having 6 to 12carbon atoms, or aralkyl group having 7 to 18 carbon atoms. m representsan integer of 1 or more.

In formula (2), an alkylene group represented by R4 is preferably analkylene group having 3 to 10 carbon atoms, and more preferably 3 to 6carbon atoms. The alkylene group represented by R4 may be a linear form,a branched form or a cyclic form. Among them, the linear form ispreferable.

When the carbon number of the alkylene group represented by R4 is 3 ormore, deterioration of flowability of the resin composition may besuppressed, and thereby a plastic property is easily developed. When thecarbon number of the alkylene group represented by R4 is 10 or less, orthe alkylene group represented by R4 is a linear form, affinity with thecellulose ester resin tends to be enhanced. Thus, when the alkylenegroup represented by R4 is a linear form, and the carbon number fallswithin the above range, transparency and tensile fracture energyproperty of the resin shaped product, particularly transparency, isfurther improved. Also, moldability of the resin composition is furtherimproved.

In terms thereof, the alkylene group represented by R4 is preferablyn-hexylene group (—(CH2)6). That is, the polyether ester compound ispreferably a compound having n-hexylene group (—(CH2)6) as R4.

In formula (2), an alkylene group represented by R5 is preferably analkylene group having 3 to 10 carbon atoms, and more preferably 3 to 6carbon atoms. The alkylene group represented by R4 may be a linear form,a branched form or a cyclic form. Among them, the linear form ispreferable.

When the carbon number of the alkylene group represented by R5 is 3 ormore, deterioration of flowability of the resin composition may besuppressed, and thereby a plastic property is easily developed. When thecarbon number of the alkylene group represented by R5 is 10 or less, orthe alkylene group represented by R5 is a linear form, affinity with thecellulose ester resin tends to be enhanced.

Thus, when the alkylene group represented by R5 is a linear form, andthe carbon number falls within the above range, transparency and tensilefracture energy property of the resin shaped product, particularlytransparency, is further improved. Also, moldability of the resincomposition is further improved.

In terms thereof, the alkylene group represented by R5 is preferablyn-butylene group (—(CH2)4). That is, the polyether ester compound ispreferably a compound having n-butylene group (—(CH2)4) as R5.

In formula (2), an alkyl group represented by A1 and A2 is preferably analkyl group having 1 to 10 carbon atoms, and more preferably 2 to 8carbon atoms. The alkyl group represented by A1 and A2 may be a linearform, a branched form or a cyclic form. Among them, the branched form ispreferable.

Examples of the alkyl group represented by A1 and A2 include anunsubstituted aryl group such as a phenyl group and a naphthyl group,and a substituted phenyl group such as a methyl phenyl group and t-butylphenyl group.

The aralkyl group represented by A1 and A2 is a group represented by-RA-Ph. RA represents a linear or branched alkylene group having 1 to 6carbon atoms (preferably 2 to 4 carbon atoms). Ph represents anunsubstituted phenyl group, or a substituted phenyl group by a linear orbranched alkyl group having 1 to 6 carbon atoms (preferably 2 to 6carbon atoms). Examples of the aralkyl group include an unsubstitutedaralkyl group such as a benzyl group, a phenyl methyl group (phenethylgroup), a phenyl propyl group, and a phenyl butyl group, and asubstituted aralkyl group such as a methyl benzyl group, a dimethylbenzyl group, and a methyl phenethyl group.

At least one of A1 and A2 is preferably an aryl group or an aralkylgroup. That is, the polyether ester compound is preferably a compound inwhich at least one of A1 and A2 is an aryl group (preferably phenylgroup) or an aralkyl group, more preferably a compound in which both ofA1 and A2 is an aryl group (preferably phenyl group) or an aralkylgroup, and further more preferably a compound in which both A1 and A2 isan aryl group (preferably phenyl group). The polyether ester compound ispreferably a compound in which at least one of A1 and A2 is an arylgroup (preferably phenyl group) or an aralkyl group tends to generate asuitable space between molecular of the cellulose ester resin, and maybe suppressed the cellulose from being crystallized. Thus, transparencyand tensile fracture energy property of the resin shaped product,particularly tensile fracture energy property, are further improved.Also, moldability of the resin composition is further improved.

In formula (2), a range of m is not particularly limited, but the rangeis preferably 1 to 5, and for example, 1 to 3.

When m is 1 or more, the polyether ester compound is difficult to beprecipitated. When m is 5 or less, an affinity with the cellulose esterresin tends to be enhanced. Thus, when m falls within the above range,transparency and tensile fracture energy property of the resin shapedproduct, particularly tensile fracture energy property, are furtherimproved. Also, moldability of the resin composition is furtherimproved.

Next, properties of the polyether ester compound will be described.

A weight average molecular weight (Mw) of the polyether ester compoundis preferably 450 to 650, and more preferably 500 to 600.

When the weight average molecular weight (Mw) is 450 or more, it isdifficult to cause bleeding (precipitation). When the weight averagemolecular weight (Mw) is 650 or less, an affinity with the celluloseester resin tends to be enhanced. Thus, the weight average molecularweight (Mw) falls within the above range, transparency and tensilefracture energy property of the resin shaped product, particularlytensile fracture energy property, are further improved. Also,moldability of the resin composition is further improved.

Meanwhile a weight average molecular weight (Mw) is measured by gelpermeation chromatography (GPC). Specifically, a molecular weightmeasurement by GPC may be conducted in a chloroform medium by using HPLC1100 manufactured by TOSOH CORPORATION as a measurement apparatus andTSKgel GMHHR-M+T SKgel GMHHR-M (7.8 mm I.D. 30 cm), which is a columnmanufactured by TOSOH CORPORATION. A weight average molecular weight iscalculated from the measurement result by using a calibration curveobtained by monodisperse polystyrene reference sample

A viscosity of the polyether ester compound at 25° C. is preferable 35mPa·s or more and 50 mPa·s or less, and more preferably 40 mPa·s or moreand 45 mPa·s or less.

When the viscosity is 35 mPa·s or more, dispersibility to the celluloseester resin tends to be enhanced. When the viscosity is 50 mPa·s orless, dispersion anisotropy of the polyether ester compound is difficultto be developed. Thus, when the viscosity falls within the above range,transparency and tensile fracture energy property of the resin shapedproduct, particularly tensile fracture energy property, are furtherimproved. Also, moldability of the resin composition is furtherimproved.

Meanwhile a viscosity may be measured with an E-type viscometer.

Hazen color number (APHA) of the polyether ester compound is preferably100 to 140, and more preferably 100 to 120.

When Hazen color number (APHA) is 100 or more, a difference ofrefractive index from the cellulose ester resin is small, and it isdifficult to cause a phenomenon where the resin shaped product is mademuddy whitish in color. When Hazen color number (APHA) is 140 or less,it is difficult that the resin shaped product becomes yellowish incolor. Thus, when Hazen color number falls within the above range,transparency of the resin shaped product is further improved.

Hazen color number (APHA) may be measured in accordance with JIS K0071-1 (1998).

A solubility parameter (SP value) of the polyether ester compound ispreferably 9.5 to 9.9, and more preferably 9.6 to 9.8.

When the solubility parameter (SP value) is 9.5 to 9.9, dispersibilityto the cellulose ester resin tends to be enhanced. Thus, when thesolubility parameter falls within the above range, transparency andtensile fracture energy property of the resin shaped product,particularly tensile fracture energy property, are further improved.Also, moldability of the resin composition is further improved.

A solubility parameter is calculated by a method of Fedor. Specifically,the solubility parameter is calculated from the following equation inaccordance with the method described in “Polym. Eng. Sci., vol. 14, p.147 (1974)”.

SP value=√{square root over ( )}(Ev/v)=√{square root over ()}(ΣΔei/ΣΔvi)

In equation, Ev represents evaporation energy (cal/mol), v represents amolar volume (cm3/mol), Δei represents evaporation energy of respectiveatoms or respective atom groups, and Δvi represents a molar volume.

Meanwhile, a solubility parameter (SP value) is represented by using(cal/cm3)½ as a unit, but according to conventional practice, such anunit is omitted and the SP value is represented as a dimensionlessvalue.

Here, in terms of particularly improvement of transparency and tensilefracture energy property, the polyether ester compound is preferably acompound in which R5 is a n-butylene group, at least one of A1 and A2 isan aryl group or an aralkyl group, and a weight average molecular weight(Mw) is 450 to 650.

Also, in terms of the same aspect, the polyether ester compounds ispreferably a compound in which a viscosity at 25° C. is 35 mPa·s or moreand 50 mPa·s or less, Hazen color number (APHA) is 100 to 140, and asolubility parameter (SP value) is 9.5 to 9.9.

Hereinafter, specific examples of the polyether ester compound will beshown, but the polyether ester compound is not limited thereto.

Viscosity No. R4 R5 A1 A2 Mw (at 25° C.) APHA SP Value PEE1 Compound 9—(CH2)6— —(CH2)4— phenyl group phenyl group 550 43 120 9.7 PEE 2Compound 10 —(CH2)2— —(CH2)4— phenyl group phenyl group 570 44 115 9.4PEE 3 Compound 11 —(CH2)10— —(CH2)4— phenyl group phenyl group 520 48110 10.0 PEE 4 Compound 12 —(CH2)6— —(CH2)2— phenyl group phenyl group550 43 115 9.3 PEE 5 Compound 13 —(CH2)6— —(CH2)10— phenyl group phenylgroup 540 45 115 10.1 PEE 6 Compound 14 —(CH2)6— —(CH2)4— t-butyl groupt-butyl group 520 44 130 9.7 PEE 7 Compound 15 —(CH2)6— —(CH2)4— phenylgroup phenyl group 460 45 125 9.7 PEE 8 Compound 16 —(CH2)6— —(CH2)4—phenyl group phenyl group 630 40 120 9.7 PEE 9 Compound 17 —(CH2)6——(CH2)4— phenyl group phenyl group 420 43 135 9.7 PEE 10 Compound 18—(CH2)6— —(CH2)4— phenyl group phenyl group 670 48 105 9.7 PEE 11Compound 19 —(CH2)6— —(CH2)4— phenyl group phenyl group 550 35 130 9.7PEE 12 Compound 20 —(CH2)6— —(CH2)4— phenyl group phenyl group 550 49125 9.7 PEE 13 Compound 21 —(CH2)6— —(CH2)4— phenyl group phenyl group550 32 120 9.7 PEE 14 Compound 22 —(CH2)6— —(CH2)4— phenyl group phenylgroup 550 53 105 9.7 PEE 15 Compound 23 —(CH2)6— —(CH2)4— phenyl groupphenyl group 550 43 135 9.7 PEE 16 Compound 24 —(CH2)6— —(CH2)4— phenylgroup phenyl group 550 43 105 9.7 PEE 17 Compound 25 —(CH2)6— —(CH2)4—phenyl group phenyl group 550 43 150 9.7 PEE 18 Compound 26 —(CH2)6——(CH2)4— phenyl group phenyl group 550 43 95 9.7

[ABS Resin]

The resin composition of exemplary embodiments of the present inventionmay further contain an ABS resin (acrylonitrile-butadiene-styrenecopolymer).

The ABS resin may be an ABS resin produced by a graft method or an ABSresin produced by a polymer-blend method.

The content of acrylonitrile in the ABS resin is preferably 10% by massto 60% by mass, and the content of butadiene in the ABS resin ispreferably 5% by mass to 30% by mass. In the case where the contents ofcomponents in the ABS resin fall within the above range, there can beprovided a resin composition capable of obtaining a resin shaped producthaving an excellent water repellency.

Melt flow rate (MFR) of the ABS resin is preferably 10 g/10 min to 30g/10 min, and more preferably 15 g/10 min to 25 g/10 min.

When melt flow rate (MFR) of the ABS resin is 10 g/10 min or more,dispersibility thereof to the cellulose ester resin tends to beenhanced. When melt flow rate (MFR) of the ABS resin is 30 g/10 min orless, affinity thereof with the cellulose ester resin tends to beenhanced. Accordingly, when the melt flow rate (MFR) of the ABS resinfalls within the above range, water repellency of the resin shapedproduct is further improved. Also, moldability of the resin compositionis further improved.

The melt flow rate (MFR) of the ABS resin may be measured by using amelt indexer (G-01, manufactured by TOYO SEIKI SEISAKU-SHO, LTD.) at atemperature of 230° C. and a load of 21.2 N.

Hereinafter, specific examples of the ABS resin will be shown, but theABS resin is not limited thereto.

MFR No. Product Name Manufacturer (g/10 min) ABS 1 Compound 30 TOYOLAC700-314 TORAY INDUSTRIES, INC. 23 ABS 2 Compound 31 TOYOLAC 100-322TORAY INDUSTRIES 15 ABS 3 Compound 32 TOYOLAC 250-X10 TORAY INDUSTRIES48 ABS 4 Compound 33 TOYOLAC 300-225 TORAY INDUSTRIES 9 ABS 5 Compound34 Cevian V500 Daicel Polymer Ltd. 11

[Maleic Anhydride-Modified Ethylene-Vinyl Acetate Copolymer]

The resin composition of exemplary embodiments of the present inventionmay further contain a maleic anhydride-modified EVA resin (maleicanhydride-modified ethylene-vinyl acetate copolymer).

The maleic anhydride-modified EVA resin is an ethylene-vinyl acetatecopolymer graft-modified by a maleic anhydride. The maleicanhydride-modified EVA resin may be obtained by, for example, grafting amaleic anhydride on the ethylene-vinyl acetate copolymer and usingorganic peroxides or a radical generated by thermal decomposition methodor the like as a starting material.

The maleic anhydride-modified EVA resin preferably has a density of 0.9to 0.94 and a melting point of 90° C. to 100° C., and more preferably adensity of 0.91 to 0.93 and a melting point of 92° C. to 98° C.

When the density of the resin is 0.9 to 0.94 and the melting point is90° C. to 100° C., reactivity of the maleic anhydride-modified EVA resinto a hydroxyl group of the cellulose ester resin tends to be enhanced.Also, lowering in flowability of the resin composition is suppressed,and thereby thermoplastic property tends to be developed. Accordingly,when the density and the melting point of the maleic anhydride-modifiedEVA resin fall within the above range, moldability of the resincomposition and bleeding resistance of the resin shaped product arefurther improved.

The density of the maleic anhydride-modified EVA resin may be measuredby the hydrometry in accordance with JIS K 0061 (2001). The meltingpoint of the maleic anhydride-modified EVA resin may be measured by themethod in accordance with JIS K 7121 (2012).

Hereinafter, specific examples of the maleic anhydride-modified EVAresin will be shown, but the maleic anhydride-modified EVA resin is notlimited thereto.

Product Melting No. Name Manufacturer Density Point (° C.) EVA 1Compound 35 MODIC A543 Mitsubishi Chemical Corporation 0.92 98 EVA 2Compound 36 MODIC A515 Mitsubishi Chemical Corporation 0.95 88

[Polyhydroxyalkanoate Resin]

The resin composition of exemplary embodiments of the present inventionmay further contain a polyhydroxyalkanoate resin. Examples of thepolyhydroxyalkanoate resin include a polyhydroxyalkanoate resinrepresented by formula (3).

Here, R6 represents an alkylene group having 1 to 10 carbon atoms, and prepresents and integer of 1 or more.

The alkylene group represented by R6 is preferably an alkylene grouphaving 3 to 6 carbon atoms. The alkylene group represented by R6 may bea linear form or a branched form, but is preferably a branched form interms of improvement of surface glossiness of the resin shaped productand moldability of the resin composition.

In formula (3), a range of p is not particularly limited, but ispreferably 10 to 2000, and more preferably 50 to 1000. When p fallswithin the range of 10 to 2000, surface glossiness of the resin shapedproduct is further improved. Further, moldability of the resincomposition is further improved.

Here, “R6 represent an alkylene group in formula (3)” means 1) thatformula (3) includes the same [O-R6-C(═O)—] structure in which R6's arethe same or 2) that formula (3) includes a plurality of [O—R6—C(═O)—]structure in which R6's are different in carbon number or branchedstate.

That is, the polyhydroxyalkanoate resin may be a polymer in which onekind of hydroxyalkanoate (hydroxyalkanoic acid) is singly polymerized ormay be a copolymer in which two or more kinds of hydroxyalkanoate(hydroxyalkanoic acid) are copolymerized.

Examples of hydroxyalkanoic acid for forming the polyhydroxyalkanoateresin include a lactic acid, 2-hydroxybutyric acid, 3-hydroxybutyricacid, 4-hydroxybutyric acid, 2-hydroxy-3-methyl-butyric acid,2-hydroxy-3,3-dimethyl-butyric acid, 3-hydroxyvaleric acid, 4-hydroxyvaleric acid, 5-hydroxy valeric acid, 3-hydroxyhexanoic acid,2-hydroxycaproic acid, 2-hidroxyisocapoic acid, 6-hydroxycapoic acid,3-hydroxypropionic acid, 3-hydroxy-2,2-dimethylpropionic acid and2-hydroxy-n-octanoic acid.

Of these, the polyhydroxyalkanoate resin is preferably a copolymer resinof a branched hydroxyalkanoic acid having 2 to 4 carbon atoms and abranched hydroxylalkanoic acid having 5 to 7 carbon atoms (the carbonnumber includes a carbon atom contained in a carboxyl group), and morepreferably a copolymer resin of 3-hydroxybutyric acid and3-hydroxycaproic acid (copolymer resin of 3-hydroxybutylate and3-hydroxyhexanoate). In the case of using this copolymer resin, thepolyhydroxyalkanoate resin easily form a fine spherical structure, andsurface glossiness of the resin shaped product is further improved.Also, moldability of the resin composition is further improved.

The weight average molecular weight (Mw) of the polyhydroxyalkanoateresin is preferably 10,000 to 500,000, and more preferably 30,000 to200,000.

When the weight average molecular weight (Mw) falls within the range of10,000 to 500,000, surface glossiness of the resin shaped product isfurther improved. Also, moldability of the resin composition is furtherimproved. The weight average molecular weight (Mw) may be measured inthe same manner as in the method for measuring the weight averagemolecular weight of the polyether ester compound.

Hereinafter, specific examples of the polyhydroxyalkanoate resin will beshown, but the polyhydroxyalkanoate resin is not limited thereto.

No. Compound Name Product Name Manufacturer R6 PHA1 Compound 37Copolymer of 3-hydroxy butyric acid AONILEX Kaneka Corporation Propylenegroup/pentylene group and 3-hydroxycaproic acid [O(C3H6)CO]/[O(C5H6)CO](Mass ratio = 90/10) PHA 2 Compound 38 Polylactic acid TERRAMAC UNITIKALTD. Methylene group TE 2000 PHA 3 Compound 39 Copolymer of 3-hydroxybutyric acid BIOPOL 3000 Monsanto Company Propylene group/butylene groupand 3-hydroxyvaleric acid [O(C3H6)CO]/[O(C4H8)CO] (Mass ratio = 80/20)

[Polyolefin Resin]

The resin composition of exemplary embodiments of the present inventionmay further contain a polyolefin resin.

The polyolefin resin may be a polymer of one kind of olefin or may be acopolymer of two kinds of olefin. The olefin may be a linear or branchedaliphatic olefin or may be a alicyclic olefin.

The linear or branched aliphatic olefin may be an aliphatic olefinhaving 2 to 18 carbon atoms (preferably 2 to 12 carbon atoms), andexamples thereof include a-olefin such as ethylene, propylene, 1-butene,1-hexene, 4-methyl-1-pentene, 1-octene, 1-decene, 1-hexadecene,1-octadecene.

The alicyclic olefin may be an alicyclic olefin having 4 to 8 carbonatoms (preferably 4 to 6 carbon atoms), and examples thereof includecyclopentene, cycloheptene, norbornene, 5-methyl-2-norbornene,tetracyclododecene, vinylcyclohexane, and the like.

Of these, the polyolefin is preferably an aliphatic olefin having 2 to 6carbon atoms in terms of suppression of creaking noise of the resincomposition at molding and improvement of steel ball drop strength ofthe resin shaped product.

The weight average molecular weight (Mw) of the polyolefin resin ispreferably 20,000 or more and less than 150,000, and more preferably30,000 or more and 50,000 or less.

When the weight average molecular weight (Mw) is 20,000 or more and lessthan 150,000, creaking noise of the resin composition at molding isfurther suppressed, and steel ball drop strength of the resin shapedproduct is further improved.

The weight average molecular weight may be measured in the same manneras in the method for measuring the weight average molecular weight ofthe polyether ester compound.

Hereinafter, specific examples of the polyolefin resin will be shown,but the polyolefin resin is not limited thereto.

No. Compound Name Product Name Manufacturer Mw PO 1 Compound 40Polyethylene SGF 4960 Braskem S.A. 144000 PO 2 Compound 41 PolyethyleneSHA 7260 Braskem S.A. 47700 PO 3 Compound 42 Polypropylene NOVATEC BC8Japan Polypropylene 105000 Corporation

[Amount of Cellulose Ester Resin and Polyether Ester Compound]

A mass ratio of the cellulose ester resin to the polyether estercompound (cellulose ester resin/polyether ester compound) is preferably100/25 to 100/5, and more preferably 100/20 to 100/9.

When the mass ratio is 100/25 or more, the polyether ester compound isdifficult to be precipitated. When the mass ratio is 100/5 or less,anisotropy of dispersion state of the cellulose ester disappears andisotropy becomes large, and thereby intermolecular forces of thecellulose ester resins are weaken. Also, deterioration of flowability ofthe resin composition is suppressed. Thereby, a thermoplastic propertytends to be developed. Thus, the mass ratio falls within the aboverange, transparency and tensile fracture energy property of the resinshaped product, particularly tensile fracture energy property, arefurther improved. Also, water repellency, bleeding resistance, surfaceglossiness and steel ball drop strength of the resin shaped product, andmoldability of the resin composition, are further improved, and creakingnoise of the resin composition at molding is further suppressed. Also,moldability of the resin composition is further improved.

In the case where the ABS resin is contained in the system of thecellulose ester resin and the polyether ester compound, a mass ratio ofthe cellulose ester to the ABS resin is preferably 100/8 to 100/2, andmore preferably 100/5 to 100/2.

When the mass ratio is 100/8 or more, dispersibility of the ABS resin isenhanced. When the mass ratio is 100/2 or less, a protective function ofthe ABS resin for protecting a hydroxyl group of the cellulose estercompound is enhanced. Thus, when the mass ratio falls within the aboverange, water repellency of the resin shaped product is further improved.

In the case where the maleic anhydride-modified EVA resin is containedin the system of the cellulose ester resin and the polyether estercompound, a mass ratio of the cellulose ester to the maleicanhydride-modified EVA resin is preferably 100/8 to 100/2, and morepreferably 100/6 to 100/2.

When the mass ratio is 100/8 or more, lowering in flowability of theresin composition is suppressed, and thereby thermoplastic propertytends to be developed. When the mass ratio is 100/2 or less, thepolyether ester compound is difficult to be precipitated. Thus, when themass ratio falls within the above range, moldability of the resincomposition and bleeding resistance of the resin shaped product arefurther improved.

In the case where the polydydroxyalkanoate resin is contained in thesystem of the cellulose ester resin and the polyether ester compound, amass ratio of the cellulose ester to the polydydroxyalkanoate resin ispreferably 100/8 to 100/2, and more preferably 100/5 to 100/2.

When the mass ratio falls within the range of 100/8 to 100/2, surfaceglossiness of the resin shaped product is further improved. Also,moldability of the resin composition is further improved.

In the case where the polyolefin resin is contained in the system of thecellulose ester resin and the polyether ester compound, a mass ratio ofthe cellulose ester to the polyolefin resin is preferably 100/8 to100/2, and more preferably 100/5 to 100/3.

When the mass ratio is 100/8 or more, steel ball drop strength tends tobe enhanced. When the mass ratio is 100/2 or less, creaking noise of theresin composition at molding tends to be suppressed. Thus, when the massratio falls within the above range, creaking noise of the resincomposition at molding is further suppressed, and steel ball dropstrength of the resin shaped product is further improved. Also,moldability of the resin shaped product is further improved.

A mass ratio of the cellulose ester resin to the total resin compositionis preferably 50% by mass to 95% by mass, and more preferably 60% bymass to 90% by mass.

[Other Components]

The resin composition of exemplary embodiments of the present inventionmay contain other components than the above components, depending onnecessity. Examples of the other components include a flame retardant, acompatibilizer, a plasticizer, an antioxidant, a release agent, a lightfastness improver, a weathering agent, a coloring agent, a pigment, areforming agent, a dripping inhibitor, an antistatic agent, a hydrolysisinhibitor, a filler, a reinforcing agent (a glass fiber, a carbon fiber,a talc, a clay, a mica, a glass flake, a milled glass, a glass beads, acrystalline silica, an alumina, a silicon nitride, an alumina nitride, aboron nitride, and the like), and the like. An amount of the othercomponents is 0% by mass to 5% by mass per the entire mass of the resincomposition. Here, “0% by mass” means that the other components are notcontained in the resin composition.

The resin composition of exemplary embodiments of the present inventionmay contain a resin other than the above resin. However, an amount ofthe resin other than the above is preferably contained in an amount of5% by mass per the total mass of the resin in the resin composition.Examples of such a resin include conventionally known thermoplasticresins, specifically: a polycarbonate resin; a polypropylene resin; apolyester resin; a polyolefin resin; a polyester carbonate resin; apolyphenylene ether resin; a polyphenylene sulfide resin; a polysulfoneresin; a polyether sulfone resin; a polyarylene resin; a polyether imideresin; a polyacetal resin; a polyvinyl acetal resin; a polyketone resin;a polyetherketone resin; a polyetheretherketone resin; a polyarylketoneresin; a polyether nitrile resin; a liquid crystalline resin; apolybenzimidazole resin; a polyparabanic acid resin; a vinyl basedpolymer or a copolymer resin obtained by polymerizing or copolymerizingone or more kind of a vinyl monomer selected from the group consistingof an aromatic alkenyl compound, a methacrylic acid ester, an acrylicacid ester, and a vinyl cyanide compound; a vinyl cyanide/diene/aromaticalkenyl compound copolymer resin, an aromatic alkenylcompound/diene/vinyl cyanide/N-phenylmaleimide copolymer resin, a vinylcyanide/(ethylene-diene-propylene (EPDM))/aromatic alkenyl compoundcopolymer resin, a vinyl chloride resin, a chlorinated vinyl chlorideresin, and the like. These resins may be used alone or may be used incombination.

[Preparation Method of Resin Composition]

The resin composition of exemplary embodiments of the present inventionis prepared by, for example, melting and kneading a mixture of the abovecomponents. Separately, the resin composition of exemplary embodimentsof the present invention is prepared by dissolving the above componentsto a solvent. As a melting and kneading method, conventional methods areexemplified. Specifically, a method in which a twin screw extruder, aHenschel mixer, a Bumbary mixer, a single screw extruder, a multiscrewextruder, and a Cokneader, or the like is used is exemplified.

[Resin Shaped Product]

The resin shaped product of exemplary embodiments of the presentinvention contains the resin composition of exemplary embodiments of thepresent invention. That is, the resin shaped product of exemplaryembodiments of the present invention has the same configuration as theresin composition.

Specifically, the resin shaped product may be obtained by forming theresin composition of exemplary embodiments of the present invention. Asa forming method, injection molding, extrusion molding, blow molding,hot press forming, coating forming, casting molding, dipping molding,vacuum forming, transfer molding, or the like may be adopted.

The forming method of the resin shaped product of exemplary embodimentsof the present invention is preferably injection molding in terms ofhigh freedom degree in shape. Particularly, in order to obtain a resinshaped product being excellent in transparency and tensile fractureenergy property by utilizing moldability (thermoplastic property andflowability) of the resin composition of exemplary embodiments of thepresent invention, injection molding is preferable. A cylindertemperature in injection molding is, for example, 200° C. to 250° C.,and preferably 210° C. to 230° C. A mold temperature in injectionmolding is, for example, 40° C. to 60° C., and preferably 45° C. to 55°C. Injection molding may be conducted by using a commercially availableapparatus such as NEX 150 manufactured by NISSEI PLASTIC INDUSTRIAL CO.,LTD, NEX 70000 manufactured by NISSEI PLASTIC INDUSTRIAL CO., LTD, andSE50D manufactured by TOSHIBA MACHINE CO., LTD.

The resin shaped product of exemplary embodiments of the presentinvention is suitable used for electronic/electrical equipments, officeautomation equipments, home appliances, automotive interior materials,containers, and the like. More specifically, casing ofelectronic/electrical equipments or home appliances, various parts ofelectronic/electrical equipments or home appliances, storage cases ofCD-ROM, DVD, or the like, tableware, beverage bottles, wrap films,films, sheets, and the like is exemplified.

EXAMPLE

Hereinafter, the present exemplary embodiment will be described indetail based on Examples, but the invention is not limited to theseExamples below.

Further, “parts” indicates “parts by mass” unless otherwise noted.

Examples 1 to 31 and Comparative Examples 1 to 14 Kneading

Materials having components shown in Tables 1 and 2 are placed in a twinscrew kneader (TEX41SS, manufactured by TOSHIBA MACHINE CO., LTD) andkneaded at a cylinder temperature of 220° C. to 250° C. to obtain apellet of a resin composition (hereinafter, referred to as “resinpellet”). Meanwhile, in Tables 1 and 2, “parts” means “parts by mass”.

[Injection Molding]

The obtained pellet is placed in an injection molding machine (PNX 40,manufactured by NISSEI PLASTIC INDUSTRIAL CO., LTD) and injection-moldedat a cylinder temperature of 220° C. to 250° C. and a mold temperatureof 40° C. to 60° C. to obtain ISO multi-purpose dumbbell test specimens(length for the test portion is 100 mm, width for the test portion is 10mm, and a thickness of 4 mm) and D2 shaped product (length of 60 mm,width 60 mm, and thickness of 2 mm).

The each test specimen obtained is evaluated as follows. The results areshown in Tables 1 and 2.

—Transparency—

Total light transmittance of the D2 test specimens are measured by usinga Haze meter (MH-150, manufactured by MURAKAMI COLOR RESEARCH LABORATORYCO., LTD.) in accordance with JIS K 7375 to evaluate transparency.

—Tensile Fracture Energy—

Tensile test of the ISO multi-purpose dumbbell test specimens by usingan autograph (AG 10N-Xplus, manufactured by Shimadzu Corporation) inaccordance with ISO 527 is conducted, and tensile fracture energy iscalculated from an area of S—S curve.

TABLE 1 Components Transparency Tensile Cellulose Polyether ester (Totallight Fracture ester resin compound Other additives transmittance)Energy Kind Part Kind Part Kind Part (%) (J) Ex. 1 Compound 1 100Compound 9 15 93 24 Ex. 2 Compound 1 100 Compound 9 10 93 23 Ex. 3Compound 1 100 Compound 9 20 92 24 Ex. 4 Compound 1 100 Compound 9 25 9124 Ex. 5 Compound 1 100 Compound 9 5 92 23 Ex. 6 Compound 1 100 Compound9 27 89 15 Ex. 7 Compound 1 100 Compound 9 4 89 22 Ex. 8 Compound 2 100Compound 9 15 93 24 Ex. 9 Compound 3 100 Compound 9 15 92 23 Ex. 10Compound 4 100 Compound 9 15 89 16 Ex. 11 Compound 5 100 Compound 9 1593 23 Ex. 12 Compound 6 100 Compound 9 15 89 15 Ex. 13 Compound 7 100Compound 9 15 93 24 Ex. 14 Compound 8 100 Compound 9 15 92 23 Ex. 15Compound 1 100 Compound 10 15 85 15 Ex. 16 Compound 1 100 Compound 11 1585 14 Ex. 17 Compound 1 100 Compound 12 15 88 16 Ex. 18 Compound 1 100Compound 13 15 89 17 Ex. 19 Compound 1 100 Compound 14 15 86 17 Ex. 20Compound 1 100 Compound 15 15 92 24 Ex. 21 Compound 1 100 Compound 16 1593 24 Ex. 22 Compound 1 100 Compound 17 15 86 17 Ex. 23 Compound 1 100Compound 18 15 88 15 Ex. 24 Compound 1 100 Compound 19 15 93 23 Ex. 25Compound 1 100 Compound 20 15 93 24 Ex. 26 Compound 1 100 Compound 21 1587 18 Ex. 27 Compound 1 100 Compound 22 15 88 16 Ex. 28 Compound 1 100Compound 23 15 92 24 Ex. 29 Compound 1 100 Compound 24 15 92 23 Ex. 30Compound 1 100 Compound 25 15 85 18 Ex. 31 Compound 1 100 Compound 26 1587 19

TABLE 2 Components Transparency Tensile Cellulose Polyether ester (Totallight Fracture ester resin compound Other additives transmittance)Energy Kind Part Kind Part Kind Part (%) (J) Comp. Ex. 1 Compound 1 100Compound 27 15 77 9 Comp. Ex. 2 Compound 1 100 Compound 28 15 76 6 Comp.Ex. 3 Compound 1 100 Compound 29 15 79 7 Comp. Ex. 4 Compound 1 100Compound 27 10 75 8 Comp. Ex. 5 Compound 1 100 Compound 27 20 74 11Comp. Ex. 6 Compound 1 100 Compound 27 25 73 9 Comp. Ex. 7 Compound 1100 Compound 27 5 77 5 Comp. Ex. 8 Compound 2 100 Compound 27 15 76 7Comp. Ex. 9 Compound 3 100 Compound 27 15 75 8 Comp. Ex. 10 Compound 4100 Compound 27 15 73 6 Comp. Ex. 11 Compound 5 100 Compound 27 15 76 9Comp. Ex. 12 Compound 6 100 Compound 27 15 78 7 Comp. Ex. 13 Compound 7100 Compound 27 15 78 7 Comp. Ex. 14 Compound 8 100 Compound 27 15 76 8

It is apparent from the above results that Examples are superior in bothtransparency (total light transmittance) and tensile fracture energy toComparative Examples.

Examples 32 to 70 and Comparative Examples 15 to 21 Kneading

Materials having components shown in Tables 3 and 4 are placed in a twinscrew kneader (TEX41SS, manufactured by TOSHIBA MACHINE CO., LTD) andkneaded at a cylinder temperature of 220° C. to 250° C. to obtain apellet of a resin composition (hereinafter, referred to as “resinpellet”). Meanwhile, in Tables 3 and 4, “parts” means “parts by mass”.

[Injection Molding]

The obtained pellet is placed in an injection molding machine (PNX 40,manufactured by NISSEI PLASTIC INDUSTRIAL CO., LTD) and injection-moldedat a cylinder temperature of 220° C. to 250° C. and a mold temperatureof 40° C. to 60° C. to obtain D2 shaped product (length of 60 mm, width60 mm, and thickness of 2 mm).

[Evaluation]

The obtained D2 specimens are evaluated as follows. The results areshown in Tables 3 and 4.

—Water Repellency—

A contact angle of hyperpure water on the D2 specimens is measured byusing a contact angle measuring apparatus (DM-901, manufactured by KyowaInterface Science Co., LTD.) to evaluate water repellency.

TABLE 3 Water Components repellency Cellulose Polyether ester Other(contact ester resin compound ABS resin additives angle) Kind Part KindPart Kind Part Kind Part (°) Ex. 32 Compound 1 100 Compound 9 15Compound 30 5 91 Ex. 33 Compound 1 100 Compound 9 10 Compound 30 5 90Ex. 34 Compound 1 100 Compound 9 20 Compound 30 5 91 Ex. 35 Compound 1100 Compound 9 25 Compound 30 5 93 Ex. 36 Compound 1 100 Compound 9 5Compound 30 5 90 Ex. 37 Compound 1 100 Compound 9 27 Compound 30 5 82Ex. 38 Compound 1 100 Compound 9 4 Compound 30 5 80 Ex. 39 Compound 2100 Compound 9 15 Compound 30 5 90 Ex. 40 Compound 3 100 Compound 9 15Compound 30 5 91 Ex. 41 Compound 4 100 Compound 9 15 Compound 30 5 85Ex. 42 Compound 5 100 Compound 9 15 Compound 30 5 90 Ex. 43 Compound 6100 Compound 9 15 Compound 30 5 83 Ex. 44 Compound 7 100 Compound 9 15Compound 30 5 86 Ex. 45 Compound 8 100 Compound 9 15 Compound 30 5 85Ex. 46 Compound 1 100 Compound 10 15 Compound 30 5 84 Ex. 47 Compound 1100 Compound 11 15 Compound 30 5 86 Ex. 48 Compound 1 100 Compound 12 15Compound 30 5 85 Ex. 49 Compound 1 100 Compound 13 15 Compound 30 5 82Ex. 50 Compound 1 100 Compound 14 15 Compound 30 5 85 Ex. 51 Compound 1100 Compound 15 15 Compound 30 5 90 Ex. 52 Compound 1 100 Compound 16 15Compound 30 5 91 Ex. 53 Compound 1 100 Compound 17 15 Compound 30 5 84Ex. 54 Compound 1 100 Compound 18 15 Compound 30 5 85 Ex. 55 Compound 1100 Compound 19 15 Compound 30 5 90 Ex. 56 Compound 1 100 Compound 20 15Compound 30 5 91 Ex. 57 Compound 1 100 Compound 21 15 Compound 30 5 86Ex. 58 Compound 1 100 Compound 22 15 Compound 30 5 83 Ex. 59 Compound 1100 Compound 23 15 Compound 30 5 91 Ex. 60 Compound 1 100 Compound 9 10Compound 30 2 90 Ex. 61 Compound 1 100 Compound 9 10 Compound 30 8 91Ex. 62 Compound 1 100 Compound 9 10 Compound 30 1 86 Ex. 63 Compound 1100 Compound 9 10 Compound 30 9 85 Ex. 64 Compound 1 100 Compound 9 10Compound 31 5 91 Ex. 65 Compound 1 100 Compound 9 10 Compound 32 5 87Ex. 66 Compound 1 100 Compound 9 10 Compound 33 5 87 Ex. 67 Compound 1100 Compound 9 10 Compound 34 5 92 Ex. 68 Compound 1 100 Compound 9 1061 Ex. 69 Compound 1 100 Compound 9 25 58 Ex. 70 Compound 1 100 Compound9 5 62

TABLE 4 Components Cellulose Polyether ester Water repellency esterresin compound ABS resin Other additives (contact angle) Kind Part KindPart Kind Part Kind Part (°) Comp. Ex. 15 Compound 1 100 Compound 30 5Compound 27 10 55 Comp. Ex. 16 Compound 1 100 Compound 30 5 Compound 2725 56 Comp. Ex. 17 Compound 1 100 Compound 30 5 Compound 27 5 57 Comp.Ex. 18 Compound 1 100 Compound 30 2 Compound 27 10 56 Comp. Ex. 19Compound 2 100 Compound 30 8 Compound 27 10 57 Comp. Ex. 20 Compound 3100 Compound 30 5 Compound 28 10 55 Comp. Ex. 21 Compound 4 100 Compound30 5 Compound 29 10 56

It is apparent from Tables 3 and 4 that Examples are superior in waterrepellency to Comparative Examples.

Examples 71 to 106 and Comparative Examples 22 to 28 Kneading

Materials having components shown in Tables 5 and 6 are placed in a twinscrew kneader (TEX41SS, manufactured by TOSHIBA MACHINE CO., LTD) andkneaded at a cylinder temperature of 220° C. to 250° C. to obtain apellet of a resin composition (hereinafter, referred to as “resinpellet”). Meanwhile, in Tables 5 and 6, “parts” means “parts by mass”.

[Injection Molding]

The obtained pellet is placed in an injection molding machine (PNX 40,manufactured by NISSEI PLASTIC INDUSTRIAL CO., LTD) and injection-moldedat a cylinder temperature of 220° C. to 250° C. and a mold temperatureof 40° C. to 60° C. to obtain D2 shaped product (length of 60 mm, width60 mm, and thickness of 2 mm).

[Evaluation]

The obtained D2 specimens and the resin pellet are evaluated as follows.The results are shown in Tables 5 and 6.

—Moldability—

Melt flow rate (MFR, g/10 min) of the resin pellet is measured by usinga melt indexer (G-01, manufactured by TOYO SEIKI SEISAKU-SHO, LTD.) at atemperature of 230° C. and a load of 21.2 N to evaluate moldability.

—Bleeding Resistance—

The D2 specimens are put softly in a thermohygrostat bath set to atemperature of 60° C. and a humidity of 95% RH (ARL-1100-J, manufacturedby ESPEC CORP.). After an elapse time of 72 hours, the D2 specimens aretaken out from the thermohygrostat bath. A surface of the D2 specimensis observed by visual observation to evaluate bleeding resistance. Thecriteria of the evaluation are follows.

5: No bleeding in liquid and fogging due to bleeding4: Generation of fogging due to bleeding in a part of the surface3: Generation of fogging due to bleeding in the entire surface2: Generation of bleeding in liquid in a part of the surface1: Generation of bleeding in liquid in the entire surface

TABLE 5 Components Cellulose Polyether ester Maleic anhydride- OtherMoldability Bleeding ester resin compound modified EVA resin additives(MFR) Resistance Kind Part Kind Part Kind Part Kind Part (g/10 min)Reference Ex. 71 Compound 1 100 Compound 9 15 Compound 35 5 30 5 Ex. 72Compound 1 100 Compound 9 10 Compound 35 5 28 5 Ex. 73 Compound 1 100Compound 9 20 Compound 35 5 35 5 Ex. 74 Compound 1 100 Compound 9 25Compound 35 5 46 5 Ex. 75 Compound 1 100 Compound 9 5 Compound 35 5 23 5Ex. 76 Compound 1 100 Compound 9 27 Compound 35 5 55 4 Ex. 77 Compound 1100 Compound 9 4 Compound 35 5 19 4 Ex. 78 Compound 2 100 Compound 9 15Compound 35 5 26 5 Ex. 79 Compound 3 100 Compound 9 15 Compound 35 5 285 Ex. 80 Compound 4 100 Compound 9 15 Compound 35 5 19 4 Ex. 81 Compound5 100 Compound 9 15 Compound 35 5 29 5 Ex. 82 Compound 6 100 Compound 915 Compound 35 5 18 4 Ex. 83 Compound 7 100 Compound 9 15 Compound 35 518 4 Ex. 84 Compound 8 100 Compound 9 15 Compound 35 5 19 4 Ex. 85Compound 1 100 Compound 10 15 Compound 35 5 20 4 Ex. 86 Compound 1 100Compound 11 15 Compound 35 5 18 4 Ex. 87 Compound 1 100 Compound 12 15Compound 35 5 19 4 Ex. 88 Compound 1 100 Compound 13 15 Compound 35 5 184 Ex. 89 Compound 1 100 Compound 14 15 Compound 35 5 19 4 Ex. 90Compound 1 100 Compound 15 15 Compound 35 5 28 5 Ex. 91 Compound 1 100Compound 16 15 Compound 35 5 27 5 Ex. 92 Compound 1 100 Compound 17 15Compound 35 5 18 4 Ex. 93 Compound 1 100 Compound 18 15 Compound 35 5 174 Ex. 94 Compound 1 100 Compound 19 15 Compound 35 5 26 5 Ex. 95Compound 1 100 Compound 20 15 Compound 35 5 27 5 Ex. 96 Compound 1 100Compound 21 15 Compound 35 5 19 4 Ex. 97 Compound 1 100 Compound 22 15Compound 35 5 19 4 Ex. 98 Compound 1 100 Compound 23 15 Compound 35 5 295 Ex. 99 Compound 1 100 Compound 9 10 Compound 35 2 26 5 Ex. 100Compound 1 100 Compound 9 10 Compound 35 8 19 4 Ex. 101 Compound 1 100Compound 9 10 Compound 35 1 19 4 Ex. 102 Compound 1 100 Compound 9 10Compound 35 9 25 5 Ex. 103 Compound 1 100 Compound 9 10 Compound 36 5 224 Ex. 104 Compound 1 100 Compound 9 10 20 3 Ex. 105 Compound 1 100Compound 9 25 28 2 Ex. 106 Compound 1 100 Compound 9 5 1.5 4

TABLE 6 Components Cellulose Polyether ester Maleic anhydride-Moldability Bleeding ester resin compound modified EVA resin Otheradditives (MFR) Resistance Kind Part Kind Part Kind Part Kind Part (g/10min) Reference Comp. Ex. 22 Compound 1 100 Compound 35 5 Compound 27 105.5 1 Comp. Ex. 23 Compound 1 100 Compound 35 5 Compound 27 25 20 1Comp. Ex. 24 Compound 1 100 Compound 35 5 Compound 27 5 0.5 1 Comp. Ex.25 Compound 1 100 Compound 35 2 Compound 27 10 4.5 1 Comp. Ex. 26Compound 2 100 Compound 35 8 Compound 27 10 5.5 1 Comp. Ex. 27 Compound3 100 Compound 35 5 Compound 28 10 4 1 Comp. Ex. 28 Compound 4 100Compound 35 5 Compound 29 10 4.5 1

It is apparent from Tables 5 and 6 that Examples are superior inmoldability (MFR) and bleeding resistance to Comparative Examples.

Examples 107 to 143 and Comparative Examples 29 to 35 Kneading

Materials having components shown in Tables 7 and 8 are placed in a twinscrew kneader (TEX41SS, manufactured by TOSHIBA MACHINE CO., LTD) andkneaded at a cylinder temperature of 220° C. to 250° C. to obtain apellet of a resin composition (hereinafter, referred to as “resinpellet”). Meanwhile, in Tables 7 and 8, “parts” means “parts by mass”.

[Injection Molding]

The obtained pellet is placed in an injection molding machine (PNX 40,manufactured by NISSEI PLASTIC INDUSTRIAL CO., LTD) and injection-moldedat a cylinder temperature of 220° C. to 250° C. and a mold temperatureof 40° C. to 60° C. to obtain D2 shaped product (length of 60 mm, width60 mm, and thickness of 2 mm).

[Evaluation]

The obtained D2 specimens and the resin pellet are evaluated as follows.The results are shown in Tables 7 and 8.

—Moldability—

Melt flow rate (MFR, g/10 min) of the resin pellet is measured by usinga melt indexer (G-01, manufactured by TOYO SEIKI SEISAKU-SHO, LTD.) at atemperature of 230° C. and a load of 21.2 N to evaluate moldability.

—Surface Glossiness—

Glossiness of the surface of the D2 specimens are measured by using agloss checker (IG410, manufactured by HORIBA, Ltd.) to evaluate surfaceglossiness.

TABLE 7 Components Cellulose Polyether ester Polyhydroxyalkanoate OtherMoldability Surface ester resin compound resin additives (MFR)glossiness Kind Part Kind Part Kind Part Kind Part (g/10 min) (%) Ex.107 Compound 1 100 Compound 9 15 Compound 37 5 35.0 95 Ex. 108 Compound1 100 Compound 9 10 Compound 37 5 38.0 95 Ex. 109 Compound 1 100Compound 9 20 Compound 37 5 45.0 95 Ex. 110 Compound 1 100 Compound 9 25Compound 37 5 55.0 95 Ex. 111 Compound 1 100 Compound 9 5 Compound 37 539.0 95 Ex. 112 Compound 1 100 Compound 9 27 Compound 37 5 60.0 90 Ex.113 Compound 1 100 Compound 9 4 Compound 37 5 27.0 90 Ex. 114 Compound 2100 Compound 9 15 Compound 37 5 36.0 95 Ex. 115 Compound 3 100 Compound9 15 Compound 37 5 39.0 95 Ex. 116 Compound 4 100 Compound 9 15 Compound37 5 29.0 90 Ex. 117 Compound 5 100 Compound 9 15 Compound 37 5 45.0 95Ex. 118 Compound 6 100 Compound 9 15 Compound 37 5 28.0 90 Ex. 119Compound 7 100 Compound 9 15 Compound 37 5 27.0 90 Ex. 120 Compound 8100 Compound 9 15 Compound 37 5 24.0 90 Ex. 121 Compound 1 100 Compound10 15 Compound 37 5 42.0 85 Ex. 122 Compound 1 100 Compound 11 15Compound 37 5 28.0 90 Ex. 123 Compound 1 100 Compound 12 15 Compound 375 28.0 90 Ex. 124 Compound 1 100 Compound 13 15 Compound 37 5 45.0 85Ex. 125 Compound 1 100 Compound 14 15 Compound 37 5 24.0 90 Ex. 126Compound 1 100 Compound 15 15 Compound 37 5 34.0 95 Ex. 127 Compound 1100 Compound 16 15 Compound 37 5 36.0 95 Ex. 128 Compound 1 100 Compound17 15 Compound 37 5 24.0 91 Ex. 129 Compound 1 100 Compound 18 15Compound 37 5 26.0 90 Ex. 130 Compound 1 100 Compound 19 15 Compound 375 38.0 95 Ex. 131 Compound 1 100 Compound 20 15 Compound 37 5 40.0 95Ex. 132 Compound 1 100 Compound 21 15 Compound 37 5 26.0 90 Ex. 133Compound 1 100 Compound 22 15 Compound 37 5 24.0 90 Ex. 134 Compound 1100 Compound 23 15 Compound 37 5 40.0 94 Ex. 135 Compound 1 100 Compound9 10 Compound 37 2 35.0 95 Ex. 136 Compound 1 100 Compound 9 10 Compound37 8 24.0 90 Ex. 137 Compound 1 100 Compound 9 10 Compound 37 1 24.0 90Ex. 138 Compound 1 100 Compound 9 10 Compound 37 9 29.0 95 Ex. 139Compound 1 100 Compound 9 10 Compound 38 5 28.0 90 Ex. 140 Compound 1100 Compound 9 10 Compound 39 5 25.0 90 Ex. 141 Compound 1 100 Compound9 10 20.0 85 Ex. 142 Compound 1 100 Compound 9 25 28.0 86 Ex. 143Compound 1 100 Compound 9 5 1.5 83

TABLE 8 Components Polyether Cellulose ester PolyhydroxyalkanoateMoldability Surface ester resin compound resin Other additives (MFR)glossiness Kind Part Kind Part Kind Part Kind Part (g/10 min) (%) Comp.Ex. 29 Compound 1 100 Compound 37 5 Compound 27 10 7.5 80 Comp. Ex. 30Compound 1 100 Compound 37 5 Compound 27 25 26.0 80 Comp. Ex. 31Compound 1 100 Compound 37 5 Compound 27 5 2.5 81 Comp. Ex. 32 Compound1 100 Compound 37 2 Compound 27 10 6.5 80 Comp. Ex. 33 Compound 2 100Compound 37 8 Compound 27 10 7.5 79 Comp. Ex. 34 Compound 3 100 Compound37 5 Compound 28 10 6.5 80 Comp. Ex. 35 Compound 4 100 Compound 37 5Compound 29 10 7.0 81

It is apparent from Tables 7 and 8 that Examples are superior inmoldability (MFR) and surface glossiness to Comparative Examples.

Examples 144 to 180 and Comparative Examples 36 to 42 Kneading

Materials having components shown in Tables 9 and 10 are placed in atwin screw kneader (TEX41SS, manufactured by TOSHIBA MACHINE CO., LTD)and kneaded at a cylinder temperature of 220° C. to 250° C. to obtain apellet of a resin composition (hereinafter, referred to as “resinpellet”). Meanwhile, in Tables 9 and 10, “parts” means “parts by mass”.

[Injection Molding]

The obtained pellet is placed in an injection molding machine (PNX 40,manufactured by NISSEI PLASTIC INDUSTRIAL CO., LTD) and injection-moldedat a cylinder temperature of 220° C. to 250° C. and a mold temperatureof 40° C. to 60° C. to obtain D2 shaped product (length of 60 mm, width60 mm, and thickness of 2 mm).

[Evaluation]

Creaking noise at molding is evaluated, and the obtained D2 specimensare evaluated in steel ball drop strength as follows. The results areshown in Tables 9 and 10.

—Creaking Noise at Molding—

Creaking noise at molding is evaluated a criteria whether strange noiseis generated from the screw of the injection molding machine or not.

—Steel Ball Drop Strength—

A steel ball having a weight of 500 g is dropped on the D2 specimens tocrash the D2 specimens through a pipe made from vinyl chloride. A heightwhen the D2 specimens are cracked is recorded as steel ball dropstrength.

TABLE 9 Components Steel ball Cellulose Polyether ester Other Creakingdrop ester resin compound Polyolefin resin additives noise at strengthKind Part Kind Part Kind Part Kind Part molding height Ex. 144 Compound1 100 Compound 9 15 Compound 40 5 None 1000 Ex. 145 Compound 1 100Compound 9 10 Compound 40 5 None 1000 Ex. 146 Compound 1 100 Compound 920 Compound 40 5 None 1000 Ex. 147 Compound 1 100 Compound 9 25 Compound40 5 None 1000 Ex. 148 Compound 1 100 Compound 9 5 Compound 40 5 None1000 Ex. 149 Compound 1 100 Compound 9 27 Compound 40 5 None 800 Ex. 150Compound 1 100 Compound 9 4 Compound 40 5 None 800 Ex. 151 Compound 2100 Compound 9 15 Compound 40 5 None 1000 Ex. 152 Compound 3 100Compound 9 15 Compound 40 5 None 1000 Ex. 153 Compound 4 100 Compound 915 Compound 40 5 None 800 Ex. 154 Compound 5 100 Compound 9 15 Compound40 5 None 1000 Ex. 155 Compound 6 100 Compound 9 15 Compound 40 5 None800 Ex. 156 Compound 7 100 Compound 9 15 Compound 40 5 None 800 Ex. 157Compound 8 100 Compound 9 15 Compound 40 5 None 800 Ex. 158 Compound 1100 Compound 10 15 Compound 40 5 None 800 Ex. 159 Compound 1 100Compound 11 15 Compound 40 5 None 800 Ex. 160 Compound 1 100 Compound 1215 Compound 40 5 None 800 Ex. 161 Compound 1 100 Compound 13 15 Compound40 5 None 800 Ex. 162 Compound 1 100 Compound 14 15 Compound 40 5 None800 Ex. 163 Compound 1 100 Compound 15 15 Compound 40 5 None 1000 Ex.164 Compound 1 100 Compound 16 15 Compound 40 5 None 1000 Ex. 165Compound 1 100 Compound 17 15 Compound 40 5 None 800 Ex. 166 Compound 1100 Compound 18 15 Compound 40 5 None 800 Ex. 167 Compound 1 100Compound 19 15 Compound 40 5 None 1000 Ex. 168 Compound 1 100 Compound20 15 Compound 40 5 None 1000 Ex. 169 Compound 1 100 Compound 21 15Compound 40 5 None 800 Ex. 170 Compound 1 100 Compound 22 15 Compound 405 None 800 Ex. 171 Compound 1 100 Compound 23 15 Compound 40 5 None 1000Ex. 172 Compound 1 100 Compound 9 10 Compound 40 2 None 1000 Ex. 173Compound 1 100 Compound 9 10 Compound 40 8 None 800 Ex. 174 Compound 1100 Compound 9 10 Compound 40 1 None 800 Ex. 175 Compound 1 100 Compound9 10 Compound 40 9 None 800 Ex. 176 Compound 1 100 Compound 9 10Compound 41 5 None 800 Ex. 177 Compound 1 100 Compound 9 10 Compound 425 None 800 Ex. 178 Compound 1 100 Compound 9 10 Generation 200 Ex. 179Compound 1 100 Compound 9 25 Generation 200 Ex. 180 Compound 1 100Compound 9 5 Generation 200

TABLE 10 Components Steel ball Cellulose Polyether ester Creaking dropester resin compound Polyolefin resin Other additives noise at strengthKind Part Height (mm) Part Kind Part Kind Part molding Height (mm) Comp.Ex. 36 Compound 1 100 Compound 40 5 Compound 27 10 Generation 200 Comp.Ex. 37 Compound 1 100 Compound 40 5 Compound 27 25 Generation 200 Comp.Ex. 38 Compound 1 100 Compound 40 5 Compound 27 5 Generation 200 Comp.Ex. 39 Compound 1 100 Compound 40 2 Compound 27 10 Generation 200 Comp.Ex. 40 Compound 2 100 Compound 40 8 Compound 27 10 Generation 200 Comp.Ex. 41 Compound 3 100 Compound 40 5 Compound 28 10 Generation 200 Comp.Ex. 42 Compound 4 100 Compound 40 5 Compound 29 10 Generation 200

It is apparent from Tables 9 and 10 that Examples are superior increaking noise at molding and steel ball drop strength to ComparativeExamples.

The kinds of the materials shown in Tables 1 to 10 are as follows.

Compounds 1 to 8: See the specific examples of the cellulose ester resinCompounds 9 to 26: See the specific examples of the polyether estercompoundCompound 27: Compound represented by formula (C1)Compound 28: Compound represented by formula (C2)Compound 29: Triphenyl phosphate (TPP, manufactured by DAIHACHI CHEMICALINDUSTRY CO., LTD.)Compounds 30 to 34: See the specific examples of the ABS resinCompounds 35 to 36: See the specific examples of the maleicanhydride-modified EVA resinCompounds 37 to 39: See the specific examples of thepolyhydroxyalkanoate resinCompounds 40 to 42: See the specific examples of the polyolefin resin

The foregoing description of the exemplary embodiments of the presentinvention has been provided for the purpose of illustration anddescription. It is not intended to be exhaustive or to limit theinvention to the precise forms disclosed. Obviously, many modificationsand variations will be apparent to practitioners skilled in the art. Theembodiments were chosen and described in order to best explain theprinciples of the invention and its practical applications, therebyenabling others skilled in the art to understand the invention forvarious embodiments and with the various modifications as are suited tothe particular use contemplated. It is intended that the scope of theinvention be defined by the following claims and there equivalents.

What is claimed is:
 1. A resin composition, comprising: a cellulose ester resin; a polyether ester compound; and a polyolefin resin.
 2. The resin composition according to claim 1, wherein a weight average molecular weight of the polyolefin resin is 20,000 or more and less than 50,000.
 3. The resin composition according to claim 1, wherein a mass ratio of the cellulose ester resin to the polyolefin resin is 100/8 to 100/2.
 4. The resin composition according to claim 1, wherein the cellulose ester resin is represented by formula (1):

wherein R1, R2 and R3 each independently represent a hydrogen atom or an acyl group having 1 to 3 carbon atoms, and n represents an integer of 1 or more.
 5. The resin composition according to claim 4, wherein the cellulose ester resin represented by formula (1) has an acetyl group as the acyl group each independently represented by R1, R2 and R3, and a substitution degree of acetyl group is 2.1 to 2.6.
 6. The resin composition according to claim 1, wherein the polyether ester compound is represented by formula (2):

wherein R4 and R5 each independently represent an alkylene group having 2 to 10 carbon atoms, A1 and A2 each independently represent an alkyl group having 1 to 6 carbon atoms, an aryl group having 6 to 12 carbon atoms, or aralkyl group having 7 to 18 carbon atoms, and m represents an integer of 1 or more.
 7. The resin composition according to claim 6, wherein R5 is a n-butylene group.
 8. The resin composition according to claim 6, wherein at least one of A1 and A2 represent an aryl group or an aralkyl group.
 9. The resin composition according to claim 1, wherein a weight average molecular weight (Mw) of the polyether ester compound is 450 to
 650. 10. The resin composition according to claim 1, wherein a mass ratio of the cellulose ester resin to the polyether ester compound is 100/25 to 100/5.
 11. A resin shaped product comprising the resin composition according to claim
 1. 